:root{--navy:#12243a;--blue:#176b87;--sky:#eaf6f8;--ink:#162231;--muted:#5c6978;--line:#d8e2e8;--paper:#fff;--accent:#e66c3b}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#f6f8f9;font-family:"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;line-height:1.8}a{color:#075e7b}a:hover{text-decoration-thickness:2px}.skip{position:absolute;left:-9999px}.skip:focus{left:1rem;top:1rem;background:#fff;padding:.7rem 1rem;z-index:10}.header{background:var(--navy);color:#fff}.header-inner,.main,.footer-inner{width:min(1080px,calc(100% - 40px));margin:auto}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:72px}.brand{color:#fff;text-decoration:none;font-weight:800;letter-spacing:.04em}.nav{display:flex;gap:1rem;flex-wrap:wrap}.nav a{color:#d9edf2;text-decoration:none;font-size:.92rem}.hero{background:linear-gradient(135deg,var(--navy),#164f68);color:#fff;padding:72px 0}.hero-inner{width:min(960px,calc(100% - 40px));margin:auto}.eyebrow{margin:0 0 .8rem;color:#9bd3df;font-weight:700;letter-spacing:.12em;font-size:.84rem}.hero h1{margin:0;max-width:820px;font-size:clamp(2rem,6vw,4rem);line-height:1.22;letter-spacing:.03em}.lead{max-width:760px;margin:1.4rem 0 0;font-size:clamp(1.05rem,2vw,1.25rem);color:#e6f2f5}.main{padding:56px 0 80px}.breadcrumb{font-size:.9rem;color:var(--muted);margin-bottom:2rem}.section{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:clamp(24px,4vw,46px);margin:0 0 24px}.section h2{margin:0 0 1rem;color:var(--navy);font-size:clamp(1.45rem,3vw,2rem);line-height:1.35}.section h3{margin:2rem 0 .5rem;color:var(--blue)}.section p:last-child{margin-bottom:0}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.card{border-top:4px solid var(--blue);background:var(--sky);border-radius:10px;padding:22px}.card h3{margin:0 0 .5rem;color:var(--navy)}.note{border-left:5px solid var(--accent);background:#fff5ef;padding:18px 22px;border-radius:6px}.sources li{margin:.5rem 0}.page-links{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.page-links a{display:block;background:var(--navy);color:#fff;text-decoration:none;border-radius:10px;padding:18px;font-weight:700}.footer{background:#0d1928;color:#c5d1da;padding:36px 0}.footer p{margin:.35rem 0}.footer a{color:#ccecf3}.disclaimer{max-width:840px;font-size:.86rem;color:#aebbc5}.updated{color:var(--muted);font-size:.88rem}@media(max-width:760px){.header-inner{align-items:flex-start;flex-direction:column;padding:16px 0}.nav{gap:.5rem 1rem}.hero{padding:50px 0}.cards,.page-links{grid-template-columns:1fr}.main{padding-top:36px}.section{border-radius:12px}}